Possible Clues:

• Only pearls work for me
• In my book
• In my opinion, after gym, boy must go into assembly
• Plays role differently, with new insertion for my part
• In the flesh, 'tight' describes Queen's playing
• Boy participating in gym to improve as an individual
• According to my way of thinking, fellow is one of those in The Confederacy
• Individual friend in my book
• Only pearls flawed, as far as one is concerned
• Privately friendly, hugging Queen and heir